Edible Ornamental Plants
Campanula: "All plants in the genus Campanula, which includes our native Harebells (or Bluebells, if you live in Scotland), have edible leaves, some also produce edible roots. Most of them are easily grown in a well-drained soil in sun or semi-shade. One of the nicest is C. versicolor from Europe, the leaves are very acceptable raw, and are rich in Vitamin C."